Riveting machine



a; Q gay E- E. FRANZ RIVETING MACHINE Filed August 28, 1925 Nov. 2 1926.

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9 1 it/W Patented Nov. 2, 1926.

eaTnaT EARL E. FRANZ, OF CANTON, OHIO.

RIVETING MACHINE.

Application filed August 28, 1925. Serial No. 53,132."

This invention relates to riveting machines, and more. particularly to a machine C the lining.

The above and other objects may be at-- tain-ed by constructing the machine as illustrated in the accompanying drawing, in which,

Figure 1 is a perspective View of a riveting machine embodying the invention;

section, of the head of the machine;

Fig. 3, a detached perspective view of the upsetting and countersinking die;

Fig. 4, a detached perspective view of the chuck which receives the rivets, and,

Fig. 5, asection through a portion of brake band and lining, showing a rivet upset and countersunk therein.

Similar numerals of reference indicate corresponding parts throughout the drawing.

The machine is illustrated as being designed to be manually operated, and may comprise the supporting frame 1, upon which the head, generally indicated at 2, is mounted.

A treadle 3 may be pivoted at one end to the lower portion of the frame as shown at 4, and connected, as by a link 5, with one end 7 of a lever 6, pivoted intermediate its ends,

as at 7, to a link 8 which is pivotally mounted as at 9, upon the head.

The other end of the lever 6 is pivotally connected, as at 10, to one extremity of a lever 11, which is pivoted substantially at its center, as at 12, to the head, the free extremity of said lever operatively engaging the upper end of the spring pressed plunger 13, which is mounted for vertical reciprocation within the bore 14 of the head.

A coil spring 15 is located around the plunger 13, being interposed between the shoulder 16, in the bore 14, and the shoulder 17, which is formed at the upper end portion of the plunger, thus tending to nor- Fig. 2, an enlarged elevation, partly in mally urge the plunger upward and hold the same at all times in operative contact with the free end of the lever 11.

A spindle 18 is connected to the lower end portion of the plunger 13 and provided intermediate its ends with the shoulder 19, the lower end of the spindle terminating in the reduce-d shank 20.

A chuck 21 is carried by the spindle 18,-a coil spring 22 being located around said 5 spindle andinterposed between the shoulder 19 thereof and the upper end 2301f the chuck. The lower end of the chuck is tapered as at 24 and provided with the central opening 25, slightly smaller than the head of the rivet 26, which may be inserted through the T-slot 27 at one side of the lower end portion of the chuck.

The head is provided with an arm 28 in which is located the upsetting die 29, this die being mounted in an adjusting screw 30 which is threaded through a tapped bore 31 in the arm 28, and arranged to be locked in adjusted position as by the am nut 32.

The upper end of the die 29 is concaved or dished as shownat 33, having the sharp annular edge 34 and the central stud 35 which extends upward considerably beyond the plane of the edge 34, radially disposed grooves 36 being provided in the concave portion of the die for splitting the open end of the rivet and clinching or upsetting the same, as shown at 37 in Fig. 5.

The upper portion of the die 29 is surrounded by a spaced bore 38, formed in the upper end of the adjusting screw 30, and a stripper ring 39 is slidably mounted in said bore, around the die, and normally held in the position shown in Fig. 2 by means of a coil spring 40.

When it is desired to operate the machine to rivet a new lining upon a brake band, the brake band 41 and lining 42 are placed together, as shown in Fig. 2, over the die 29, and a rivet as shown at 26 is inserted into the lower end of the chuck. The stop 43 holds the chuck in the relative position, to the shank 20, as shown in Fig. 2, permitting the rivet to be easily inserted.

The treadle 3 is then depressed, the levers 6 and 11 cooperating to depress the plunger 13, and as the chuck is moved out of engagement with the stop 43, the spring 22 will raise the chuck upon the spindle 18, bring ing the lower end of the shank 20 into en- 11o gagement with the head of the rivet, which is pressed through the brake lining and split and clinched by the die 29, which die also countersinks the rivet in the brake lining, as shown in Fig. 5.

From the above it will be seen that the rivet is punched through the brake lining, clinched and countersunk in a single operation of the machine, thus providing a quick and inexpensive means for riveting the lining to brake bands, and since the rivets are countersunk in the lining, it will be seen that only the brake lining will be permitted to contact with the usual brake drum around which the lining is placed, preventing the drum from being scored by contact with the rivets.

I claim:

1. A machine of the class described including a head, a longitudinally movable plunger in the head, a rigid rivet carrying chuck mounted on the plunger and having an opening at its lower end of less diameter than the head of the rivet to be set and through which opening the rivet must pass, a rivet driving spindle Within the chuck, means for holding the chuck upwardly away from the end of the spindle to grip the head of the rivet between the spindle and chuck and hold therivet in alinement with the spindle, and a die in the head alined with the plunger and having means for upsetting and countersinking a tubular rivet which is forced, by the spindle, through brake'lining material placed over said die.

2. A machine of the class described including a head, a longitudinally movable plunger in the head, a rigid rivet carrying chuck mounted on the plunger and having an opening at its lower end of less diameter than the head of the rivet to be set and through which opening the rivet must pass, a rivet driving spindle within the chuck carried by'the plunger, means for holding the chuck upwardly away from the end of the spindle to grip the head of the rivet between the spindle and chuck and hold the rivet in alinement with the spindle, and a die in the head alined with the plunger and having means for upsetting and countersinking a tubular rivet which is forced, by the spindle, through brake lining material placed over said die.

3. A machine of the class described including a head, a longitudinally movable plunger in the head, a rigid rivet carrying chuck mounted on the plunger and having an opening at its lower end of less diameter than the head of the rivet to be set and through whichopening the rivet must pass, a rivet driving spindle within the chuck, means for holding the chuck upwardly away from the end of the spindle to grip the head of the rivet between the spindle and chuck and hold the rivet in alinement with the spindle, a die in the head alined with the plunger and having means for upsetting and countersinking a tubular rivet which is forced, by the spindle, through brake lining material placed over said die, said chuck having a T-slot in the side, and means for lowering the chuck away from the end of the spindle to permit a rivet to be inserted through said T-slot.

In testimony that I claim the above, I

have hereunto subscribed my name.

EARL E. FRANZ. 

